oops count is going up today.

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@22380 b5f69653-2bf5-0310-8201-b0dafb8e1405
#2520 add an example of archiving in binary format.

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@22381 b5f69653-2bf5-0310-8201-b0dafb8e1405